Makayla charges 20 cents per square inch for her frame. How much will she charge for a frame that measures 18 inches on each side and has a width of 3 inches?

The answer is $10.8 (1,080 cents)

Step-by-step explanation:

First of all, let us calculate the area of the frame:

Area = Length * width = 18 * 3 = 54 in²

We are told that she charges 20 cents per square inch, therefore:

1 in² = 20 cents

∴ 54 in² = 20 * 54 = 1,080 cents.

We know that 100 cents = $1

∴ 1,080 cents = 1/100 * 1,080 = $10.8